XML 31 R18.htm IDEA: XBRL DOCUMENT v3.19.1
Earnings Per Share (Tables)
 3 Months Ended
Mar. 31, 2019
Earnings Per Share [Abstract]  
Average Common Shares Outstanding Basic and Diluted The average number of common shares outstanding is reconciled to those used in the basic and diluted EPS computations as follows:
 
 
Three Months Ended March 31
(Millions of shares)
 
2019
 
2018
Basic
 
344.3

 
350.4

Dilutive effect of stock options and restricted share unit awards
 
1.7

 
2.2

Diluted
 
346.0

 
352.6